| =pod |
| |
| =head1 NAME |
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| CMS_uncompress - uncompress a CMS CompressedData structure |
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| =head1 SYNOPSIS |
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| #include <openssl/cms.h> |
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| int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out, unsigned int flags); |
| |
| =head1 DESCRIPTION |
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| CMS_uncompress() extracts and uncompresses the content from a CMS |
| CompressedData structure B<cms>. B<data> is a BIO to write the content to and |
| B<flags> is an optional set of flags. |
| |
| The B<dcont> parameter is used in the rare case where the compressed content |
| is detached. It will normally be set to NULL. |
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| =head1 NOTES |
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| The only currently supported compression algorithm is zlib: if the structure |
| indicates the use of any other algorithm an error is returned. |
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| If zlib support is not compiled into OpenSSL then CMS_uncompress() will always |
| return an error. |
| |
| The following flags can be passed in the B<flags> parameter. |
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| If the B<CMS_TEXT> flag is set MIME headers for type B<text/plain> are deleted |
| from the content. If the content is not of type B<text/plain> then an error is |
| returned. |
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| =head1 RETURN VALUES |
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| CMS_uncompress() returns either 1 for success or 0 for failure. The error can |
| be obtained from ERR_get_error(3) |
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| =head1 BUGS |
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| The lack of single pass processing and the need to hold all data in memory as |
| mentioned in CMS_verify() also applies to CMS_decompress(). |
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| =head1 SEE ALSO |
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| L<ERR_get_error(3)|ERR_get_error(3)>, L<CMS_compress(3)|CMS_compress(3)> |
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| =head1 HISTORY |
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| CMS_uncompress() was added to OpenSSL 0.9.8 |
| |
| =cut |
